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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $487,200 | 12,744 | 5,898 |
| 2006 | $261,392 | 8,603 | 6,293 |
| 2007 | $353,920 | 13,289 | 7,467 |
| 2008 | $612,184 | 26,603 | 18,459 |
| 2009 | $374,950 | 13,264 | 8,708 |
| 2010 | $1,055,366 | 33,163 | 20,627 |
| 2011 | $1,205,012 | 30,484 | 20,398 |
Note: Quantity represents Number of pairs
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